code: def returns_frame_1():
      return pd.DataFrame(
          {
              "ticker": [
                  "spx 5/25/2001 p500",
                  "spx 5/25/2001 p600",
                  "spx 5/25/2001 p700",
              ]
          }
      )
  
imports: import numpy
  import pandas
  import pytest
  from pandas.testing import assert_frame_equal
label_desc: Use image node_id 20 for calling a global function with example usage: returns_frame_1() and returns: pd